Ku80 attentuates cytotoxicity induced by green fluorescent protein transduction independently of non-homologous end joining.

Ku80 attentuates cytotoxicity induced by green fluorescent protein transduction independently of non-homologous end joining.
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DOI:
10.1016/j.fob.2012.12.001
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发表时间:
2013
期刊:
影响因子:
2.6
通讯作者:
Koike A
Koike A
中科院分区:
生物学4区
文献类型:
--
作者:
Koike M;Yutoku Y;Koike A

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绿色荧光蛋白 (GFP) 是最常用的报告蛋白,用于监测各种活细胞和固定细胞中的基因表达和蛋白定位,不仅包括原核生物,还包括真核生物,例如酵母、哺乳动物、植物和鱼类。一般来说,人们认为 GFP 对细胞无毒,尽管也有一些关于 GFP 副作用的报道。此外,有关 GFP 副作用的分子机制的细节仍不清楚。在这里,我们证明 Ku80,而不是 XRCC4,在增强型 GFP (EGFP) 诱导的细胞毒性抗性机制中发挥重要作用。 EGFP 抑制细胞增殖和集落形成,并诱导 Ku80 缺陷仓鼠细胞(即 xrs-6 细胞)细胞死亡。此外,Ku80 减弱了 EGFP 诱导的 xrs-6 细胞的细胞毒性。在 NHEJ 核心蛋白 XRCC4 缺陷的仓鼠细胞(即 XR-1 细胞)中没有观察到 EGFP 诱导的细胞毒性。此外,EGFP 显着增强了 xrs-6 细胞中 X 射线诱导的细胞毒性。这些结果表明 Ku80 在针对 EGFP 诱导的细胞毒性的新型 NHEJ 独立防御机制中发挥着关键作用。应谨慎考虑应激反应机制的潜在影响,即EGFP诱导的细胞毒性的Ku80依赖性消除机制被激活,即使在使用Ku80正常功能的表达EGFP的细胞时也是如此。 ▸ 增强型 GFP (EGFP) 可抑制 Ku80 缺陷细胞的增殖并诱导细胞死亡。 ▸ EGFP 显着增强 X 射线诱导的 Ku80 缺陷细胞的细胞毒性。 ▸ Ku80 减弱 Ku80 缺陷细胞中 EGFP 诱导的细胞毒性。 ▸ 在 XRCC4 缺陷细胞中未观察到 EGFP 诱导的细胞毒性。 ▸ Ku80 在不依赖 NHEJ 的细胞毒性防御机制中发挥作用。
The green fluorescent protein (GFP) is the most commonly used reporter protein for monitoring gene expression and protein localization in a variety of living and fixed cells, including not only prokaryotes, but also eukaryotes, e.g., yeasts, mammals, plants and fish. In general, it is thought that GFP is nontoxic to cells, although there are some reports on the side effect of GFP. Further, details of the molecular mechanism concerning the side effect of GFP remain unclear. Here we show that Ku80, but not XRCC4, plays an important role in the mechanism of the resistance to cytotoxicity induced by enhanced GFP (EGFP). EGFP inhibited both cell proliferation and colony formation, and induced cell death in Ku80-deficient hamster cells, i.e., xrs-6 cells. In addition, Ku80 attenuated EGFP-induced cytotoxicity in the xrs-6 cells. No EGFP-induced cytotoxicity was observed in the NHEJ core protein XRCC4-deficient hamster cells, i.e., XR-1 cells. Furthermore, EGFP markedly enhanced X-ray-induced cytotoxicity in the xrs-6 cells. These results suggest that Ku80 plays a key role in the novel NHEJ-independent defense mechanism against EGFP-induced cytotoxicity. Caution should be taken in considering of the potential influence by the stress response mechanism, namely, the Ku80-dependent elimination mechanism of EGFP-induced cytotoxicity, being activated, even when using EGFP-expressing cells in which Ku80 functions normally. ▸ Enhanced GFP (EGFP) inhibits proliferation and induces cell death in Ku80-deficient cells. ▸ EGFP markedly enhances X-ray-induced cytotoxicity in Ku80-deficient cells. ▸ Ku80 attenuates EGFP-induced cytotoxicity in Ku80-deficient cells. ▸ No EGFP-induced cytotoxicity is observed in XRCC4-deficient cells. ▸ Ku80 plays a role in the NHEJ-independent defense mechanism against the cytotoxicity.
DOI: 10.1042/bj20080413
发表时间: 2009-02-01
期刊: The Biochemical journal
影响因子: --
作者:
Mahaney BL;Meek K;Lees-Miller SP
通讯作者: Lees-Miller SP
DOI: 10.1016/0378-1119(95)00685-0
发表时间: 1996-07-01
期刊: GENE
影响因子: 3.5
作者:
Cormack, BP;Valdivia, RH;Falkow, S
通讯作者: Falkow, S
DOI: 10.1002/jcp.1030590302
发表时间: 1962-01-01
影响因子: --
作者:
SHIMOMURA, O;JOHNSON, FH;SAIGA, Y
通讯作者: SAIGA, Y
DOI: 10.1128/mcb.22.22.8088-8099.2002
发表时间: 2002-11-01
影响因子: 5.3
作者:
Mo, XM;Dynan, WS
通讯作者: Dynan, WS
DOI: 10.1016/j.bbrc.2011.07.032
发表时间: 2011-08-19
影响因子: 3.1
作者:
Koike, Manabu;Yutoku, Yasutomo;Koike, Aki
通讯作者: Koike, Aki